Along with the pictures if you have credible writeup on these medicinal plants, their phytochemical constituents, ethnomedicinal and modern uses etc. publishers may be interested. Studium Press, LLc published several volumes with the theme Recent Progress in Medicinal Plants under the editorship of Prof. J.N. Govil. You can check these volumes at: http://www.studiumpress.in/lpage.asp?cat_id=6&catdesc=Medicinal+Plants&type=1&for=1 and contact the publisher.